其实,即便是0.7 ppm也是有害的,特别是对幼儿

来源: 2012-10-03 18:47:23 [博客] [旧帖] [给我悄悄话] 本文已被阅读:

http://www.ewg.org/comm/proposed-federal-cap-fluoride-water-will-not-protect-public-health